London (CNN)Britain has lost control of its borders. Immigrants make the economy more prosperous. Public services are overstretched because Europeans are pouring in. Which of these statements are fact or fiction is anybody's guess.
Immigration has proved the most divisive issue in the debate over whether Britain should remain in the European Union, and with just a week until the British public vote in a referendum to decide, no one has a clue what immigration will look like if Britain pulls out.
Brexit voices: In or out?
Those backing a "Brexit" -- Britain leaving the European Union -- say the country should have better control of who comes in.
One of the central pillars of the European Union is the free movement of labor, which essentially means any citizen from the other 27 countries in the bloc can turn up to Britain and look for work without a concrete job offer.